/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.jms;

import javax.jms.Destination;

import cgl.narada.protocol.Destinations;
import cgl.narada.util.ByteUtilities;

/**
   @author Shrideep Pallickara
   $Revision$
   $Date$
*/

public class JmsDestination implements Destination, JmsDebugFlags {

  private Destinations serverDestination;
  private int clientDestOnServer;
  
  
  public JmsDestination(Destinations serverDestination,
			int clientDestOnServer) {
    this.serverDestination = serverDestination;
    this.clientDestOnServer = clientDestOnServer;
  }
  
  public JmsDestination(byte[] jmsDestinationBytes) {
    int systemLevel = (jmsDestinationBytes.length -4)/4 -1;
    int offset =0;

    /** Unmarshall the serverDestination */
    byte[] serverDestinationBytes = new byte[4*(systemLevel+1)];
    System.arraycopy(jmsDestinationBytes, offset,
		     serverDestinationBytes, 0, 4*(systemLevel+1));
    offset += (4*(systemLevel+1));
    serverDestination = new Destinations(serverDestinationBytes);
    
    /** Unmarshall the clientDest on the server */ 
    byte[] clientDestBytes = new byte[4];
    System.arraycopy(jmsDestinationBytes, offset,
		     clientDestBytes, 0, 4);
    clientDestOnServer = ByteUtilities.getInt(clientDestBytes);
  }
  
  public byte[] getBytes() {
    int systemLevel = serverDestination.getSystemLevel();
    byte[] jmsDestinationBytes = new byte[4*(systemLevel+1) + 4];
    int offset=0;
    
    /** Marshalling the serverDestination */
    System.arraycopy(serverDestination.getDestinationsInBytes(), 0, 
		     jmsDestinationBytes, offset, 4*(systemLevel+1));
    offset += (4*(systemLevel+1));
    
    /** Marshalling the client destination on server */
    System.arraycopy(ByteUtilities.getBytes(clientDestOnServer), 0,
		     jmsDestinationBytes, offset, 4);

    return jmsDestinationBytes;
  }
  
  public Destinations getServerDestination() {
    return serverDestination;
  }

  public int getClientDestinationOnServer() {
    return clientDestOnServer;
  }
  
  /**
     Compares two objects for equality. Returns a boolean that indicates
     whether this object is equivalent to the specified object. This method
     is used when an object is stored in a hashtable.
     @param obj the Object to compare with
     @return true if these Objects are equal; false otherwise.
     @see java.util.Hashtable
  */
  public boolean equals(Object obj) {
    JmsDestination _jmsDestination = (JmsDestination)obj;

    if (_jmsDestination.getClientDestinationOnServer() == clientDestOnServer) {
      if (_jmsDestination.getServerDestination().equals(serverDestination)) {
	if (JmsDestination_Debug)
	  System.out.println("JmsDestination match%%%%%%");
	return true;
      }
    }
    return false;
  }
 
  
  /**
     Generates a hash code for the receiver. This method is supported 
     primarily for hash tables, such as those provided in java.util.
     If two objects are equal (equals(Object) returns true) they must have the 
     same hash code
     @return an integer hash code for the receiver 
  */
  public int hashCode() {
    return serverDestination.hashCode() * clientDestOnServer;
  }
 
  
  public String toString() {
    int[] destInt = serverDestination.getDestinationsInInts();
    boolean dotBefore = false;
    int addrLength = destInt.length;
    
    String stringRep = "<";

    for (int i = 0; i < addrLength; i++) {
      if (dotBefore) {
	stringRep += ".";
      }
      stringRep += destInt[i];
      if (!dotBefore) {
	dotBefore = true;
      }
    }
    stringRep+= ("::" + clientDestOnServer + ">");
    return stringRep;
  }

  public static void main(String[] args) {
    
    cgl.narada.protocol.Destinations destOne = 
      new cgl.narada.protocol.Destinations(3);
    cgl.narada.protocol.Destinations destTwo = 
      new cgl.narada.protocol.Destinations(3);

    destOne.setDestinationsAtLevel(0,8);
    destOne.setDestinationsAtLevel(1,4);
    destOne.setDestinationsAtLevel(2,2);
    destOne.setDestinationsAtLevel(3,16);

    destTwo.setDestinationsAtLevel(0,8);
    destTwo.setDestinationsAtLevel(1,4);
    destTwo.setDestinationsAtLevel(2,2);
    destTwo.setDestinationsAtLevel(3,16);

    JmsDestination jmsDest1, jmsDest2, jmsDest3;

    jmsDest1 = new JmsDestination(destOne, 8);
    jmsDest2 = new JmsDestination(destTwo, 9);
    if (!jmsDest1.equals(jmsDest2)) {
      System.out.println("No Match");
    }

    jmsDest3 = new JmsDestination(jmsDest1.getBytes());
    System.out.println(jmsDest1 + "\n" + jmsDest3);

  }

}
